In this work the polymeric precursor method was used to obtain the Zn2TiO4 doped with V5+. The phases were obtained after calcination the respective precursor powders at different temperatures, and their characterization was accomplished by X ray diffraction, thermal analysis and photoluminescence. It was difficult for vanadium to get into the polymeric net, leading to segregation in the resin and also in the final material. After doping, the thermal decomposition temperature decreased from 438 ºC to 420 ºC. The powders calcined at 400 °C and 500 °C presented a substitutional solid solution between Ti4+ and V5+ metallic ions, besides secondary phase formation. A decrease of the volume unit cell after vanadium addition was observed. Relative crystallinity and crystallite size presented a random variation due to the difficulty for vanadium substituting titanium. The best results of photoluminescent properties were obtained for the sample with 0.2 mol% of vanadium.
Zn2TiO4; photoluminescence; spinel; vanadium; Pechini method
